%This is an example.
%You can choose three different functions: Coeffi_AB,Coeffi_AM ,
%and Coeffi_BDF, with two positive integer inputArgs.
%The first inputArg represents step 's',
%And the next inputArg represents our expected order of accuacy 'p'.
%If the pair (s,p) constucts a well-posed equation set,
%the function will return a STRUCT with coefficients as members.
%Else if 'p' cannot be reached in 's' steps,
%the function will return a STRUCT with 'Empty sym: 0-by-1' as members.
%Else 's' is redunant for 'p',
%the function will return a STRUCT with a system of fundamental solutions.

clear
clc
AB4=Coeffi_AB(2,4)  %condition:'p' cannot be reached in 's' steps 
AM2=Coeffi_AM(1,2)  %condition:well-posed
BDF3=Coeffi_BDF(6,3)    %condition:redundant
